JPH08335494A - Container for electromagnetic cooking device - Google Patents

Abstract

PURPOSE: To enhance the heating value of a container for cooking made of aluminum capable of heating with an electromagnetic induction heater. CONSTITUTION: A conductor metal plate 2 is embedded in an aluminum container main body 1, and a plurality of radial slits 4 formed by cutting the outside aluminum layer and exposing the conductor metal plate 2, and connecting slits 5', 6' formed by cutting the outside aluminum layer and for connecting the radial slits 4 are formed on the outside surface of a bottom wall 1a of the container main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction heating cooker (hereinafter referred to as an electromagnetic cooker), and more particularly to an aluminum cooker container heated by a high frequency electromagnetic cooker.

[0002]

2. Description of the Related Art A cooking vessel made of aluminum has better thermal conductivity than a cooking vessel made of iron and is suitable for substantially uniform heating. Therefore, the fluororesin film coated on the inner wall surface of the vessel is localized. It has the advantage of not being damaged by overheating. In addition, since it is lighter in weight than the iron cooking container, it has the advantages of easy handling such as lifting the container, less hand fatigue, and rust unlike the iron container, but the following container for electromagnetic cooker There was a drawback that could not be used as.

Since the electromagnetic cooker does not use combustion gas as compared with a so-called flame cooker, there is no danger of gas leakage accident or fire and it is excellent in safety, the air in the room is kept fresh, and the surface of the container is kept. Since it has the advantage that it does not get dirty and is relatively easy to operate, it is gradually becoming popular. However, since the aluminum container has a low magnetic permeability and a small specific resistance, there is a problem that it cannot be heated by the electromagnetic cooker.

[0004]

In order to solve this problem, conventionally, aluminum and stainless clad material, aluminum and stainless brazing material, or a conductor metal plate cast on the outer bottom surface by press fitting. In this case, a container made of aluminum that is fixed by means such as caulking (Jitsuko Sho 61-2710)
4, No. 62-191092, Jikkai 2-344
No. 36 gazette) is considered, but the problem occurs that the conductor metal plate is distorted during casting and a large machining allowance is required to flatten the bottom surface, and the manufacturing cost becomes high. There is a problem such as becoming. In addition, since the joining force between the aluminum casting and the conductive metal plate is weak and the conductive metal plate may be deformed, the outer bottom surface, which is important as an electromagnetic cooker container, is kept flat during long-term use. This causes problems such as being unable to do so, loosening of the joint, and heat transfer to the container is not performed well.

When a conductive metal plate is embedded in the bottom wall of an aluminum casting, the above-mentioned problems are solved, but the outer bottom surface is covered with an aluminum layer, so that the container is difficult to heat. . An object of the present invention is to solve such a problem, and to provide a container for an electromagnetic cooker in which a conductor metal plate is embedded in an aluminum casting and the heating efficiency is high.

[0006]

In order to achieve the above object, in a container for an electromagnetic cooker according to the present invention, a conductor metal plate is embedded in the bottom wall of a container body made of aluminum or an aluminum alloy, A plurality of radial slits that divide the aluminum layer and connection slits that divide the aluminum layer and connect the radial slits are provided on the outer bottom wall surface of the main body.

The connecting slit is composed of a large-diameter connecting slit connecting the outer portions of the radial slits or a small-diameter connecting slit connecting the inner portions of the radial slits to each other. Both connecting slits may be used.

[0008]

The container for the electromagnetic cooker configured as described above is
Since the conductor metal plate is embedded inside the bottom wall of the container body made of aluminum or aluminum alloy, the conductor metal plate does not cause distortion even when heated, Since it does not sag, it has good heat conduction. Since the radial slits and connecting slits are provided on the outer bottom wall surface of the container body made of aluminum or aluminum alloy, the action of alternating magnetic fields on the inner and outer circumferences of the coil of the electromagnetic cooker is weak. By the cooperation of the radial slits, most of the eddy currents generated on the bottom surface of the container are generated in the conductive metal plate by the connection slits, and the conductive metal plate is efficiently heated. Since the ends of the radial slits are connected to each other by the connecting slits, a current flowing around the ends of the radial slits and trying to flow is blocked, and the heating efficiency is increased.

[0009]

EXAMPLE The present invention is a patent application filed previously (Japanese Patent Application No.
No. 198287), the outline of the previous application and the background of the improvement research thereafter are described, and then the examples of the present invention will be described. As shown in the bottom view of FIG. 6, the electromagnetic cooking container of the previous application has a stainless steel conductor metal plate 2 inside a bottom wall 1a of a container body 1 made of aluminum.
To form a plurality of pairs of standing walls 3 arranged radially on the conductor metal plate 2, and each standing wall 3 is formed on the outer bottom surface of the bottom wall 1a.
The radial slits 4 for exposing the are provided.

When this electromagnetic cooking container is placed on an electromagnetic cooker and a coil is energized, an eddy current is generated in the conductive metal plate 2 to heat the electromagnetic cooking container. At this time, a part of the eddy current generated between the radial slits 4 and 4 wraps around the end portion of the radial slit 4 and flows to the aluminum surface. It was confirmed that the heating efficiency is further improved by providing the connection slit for connecting the.

In this experiment, a conductor metal plate 2 is embedded inside a bottom wall 1a of a container body 1 made of aluminum, and a plurality of radial slits 4 exposing the conductor metal plate 2 on the outer bottom surface of the bottom wall 1a. And connection slits 5 and 6 for connecting the adjacent radial slits 4 are provided. The conductive metal plate 2 may be made of any material as long as it has a high magnetic permeability, a low coercive force, and a large specific resistance, such as iron, iron alloy,
Carbon steel, cast iron, SUS430, SUS434 ferritic stainless steel, or SUS410, SUS
It is desirable to use martensitic stainless steel plate such as 420.

FIGS. 7 (A) to 7 (J) are explanatory views of various connection slits 5 and 6 used in this experiment. Each of the electromagnetic cooking containers is heated by an electromagnetic cooker and the connection slit 5 is formed. , The effect of 6 was confirmed. FIG. 7A shows a case where one small-diameter connecting slit 5 for connecting the inner ends of the adjacent radial slits 4 among the eight radial slits 4 is provided.
FIG. 7B is a schematic diagram when two small diameter connecting slits 5 are provided, and FIG. 7C is a schematic diagram when four small diameter connecting slits 5 are provided.

In FIG. 7D, when four large-diameter connecting slits 6 for connecting the outer ends of the adjacent radial slits 4 are added, in FIG. 7E, a small-diameter connecting slit 5 is provided. Connect the outer ends of adjacent radial slits 4 without one 1
FIG. 7F shows the case where one large-diameter connecting slit 6 is provided, and FIG. 7G shows the case where one more large-diameter connecting slit 6 is added.
Shows a schematic diagram when two more are added.

FIG. 7H shows the case where the inner end portions of the eight radial slits 4 are connected by one circumferential small-diameter connecting slit 5 ', and FIG. 7I shows the eight radial slits 4. 7 (J), when the outer end portions of the two are connected by one circumferential large-diameter connecting slit 6 ′, eight radial slits 4 are formed into a circumferential small-diameter connecting slit 5 ′ and a circumferential large-diameter connecting slit 5 ′. The schematic diagram when connecting by the large diameter connection slit 6'is shown.

The electromagnetic cooking container not provided with the slits 5 and 6 is denoted by reference symbol K, the containers of FIGS. 7A to 7D are compared with the reference symbol K, and then the containers of FIGS. 7E to 7G are compared. In contrast to the code K,
Next, Table 1 shows the power consumption of each electromagnetic cooker with a rated output of 100 V and 1300 W by comparing the containers of FIGS. The larger the power consumption, the larger the heating amount of the container.

[0016]

[Table 1]

As can be seen from Table 1, when the radial slits 4 are provided with the small diameter connecting slits 5, the power consumption increases, and the larger the number of the small diameter connecting slits 5, the more the power consumption increases. Power consumption is higher when the large-diameter connecting slit 5 is provided than when the small-diameter connecting slit 5 is provided. The highest power consumption occurs when the circumferential small-diameter connecting slit 5'and the circumferential large-diameter connecting slit 6'are provided, as indicated by the symbol J. In the embodiment of the present invention, an electromagnetic cooking container designated by J, which consumes the most power, will be described.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a bottom view of an electromagnetic cooker container showing the embodiment of the present invention, and FIG. 2 is a sectional view taken along the line WW of FIG. 3 is a XX cross-sectional view (or YY cross-sectional view or ZZ cross-sectional view) of FIG. 1, and FIG. 4 is a conductor metal plate embedded in the bottom wall 1a of the container body 1 of the electromagnetic cooker container. 2 is a plan view and FIG. 5 is a sectional view taken along line VV of FIG.

As shown in FIGS. 4 and 5, the conductor metal plate 2 has a circular outer peripheral edge and a hole 7 in the center.
Are provided, annular protrusions 8 and 9 are formed outside the hole 7 and inside the outer peripheral edge, and radial protrusions 10 that reach the annular protrusion 9 from the annular protrusion 8 are provided. The annular protrusions 8 and 9 and the radial protrusions 10 are formed by pressing or the like, and protrude from one surface of the conductor metal plate 2 (from the right surface in FIG. 5) by the same height.

A large number of holes 11 are formed in the conductor metal plate 2, and when the conductor metal plate 2 is embedded in the bottom wall 1a of the container body 1, aluminum is filled in the plurality of holes 11. Therefore, the conductor metal plate 2 is integrally and strongly bonded to the container body 1. Radial slits 4 that divide the aluminum layer and expose the radial projections 10 are provided on the outer bottom surface of the bottom wall 1a, and the aluminum layer is divided at the inner end portion and the outer end portion of the radial slits 4 to form the annular protrusions 8. There are provided a small-diameter connecting slit 5'and a large-diameter connecting slit 6 ', which expose the holes 9 and 9 (see FIGS. 1 and 3).

In this embodiment, the small-diameter connecting slits 5'and the large-diameter connecting slits 5'and the large-diameter connecting slits 6'are provided at the inner and outer ends of the radial slit 4, respectively. The connecting slits 6 ′ need not necessarily be the inner and outer end portions as long as they block the current flowing around the radial slits 4, and may be the inner and outer portions.

Further, instead of the circumferential small-diameter connecting slit 5'and large-diameter connecting slit 6 ', an arc-shaped small-diameter connecting slit 5 and large-diameter connecting slit 6 may be used. or,
The small-diameter connecting slit 5'and the large-diameter connecting slit 6'have a circular shape for convenience of processing the outer bottom surface of the bottom wall 1a, but may have a polygonal shape. The small-diameter connecting slit 5 and the large-diameter connecting slit 6 may be linear instead of arcuate.

The operation of the conductor metal plate 2 configured as described above will be described. When the container for the electromagnetic cooker is placed on the plate of the electromagnetic cooker and a current flows through the coil of the electromagnetic cooker, the container is closed. The exposed portion of the conductor metal plate 2 on the bottom side is heated, and the aluminum layer on the bottom side is heated by heat conduction. Next, since most of the conductor metal plate 2 is heated, the aluminum layer on the inner surface side of the container is uniformly heated. Radial slits 4,
The eddy current generated in the aluminum layer near the small-diameter connecting slit 5'and the large-diameter connecting slit 6'is trapped and the flow is suppressed, so that the heating efficiency is increased.

[0024]

Since the container for the electromagnetic cooker of the present invention is constructed as described above, it has the following effects. (1) Since the conductive metal plate is embedded in the bottom wall of the container body made of aluminum, it has a large engaging force with the container body, and there is no risk of deformation, dropping from the container body, or shifting. ,
The upper and lower aluminum layers are connected to each other through a large number of holes in the conductor metal plate, and thus are very strong. In addition, since no gap is generated, heat conduction is good and there is no uneven heating. (2) Since the conductive metal plate is buried in the aluminum layer, most of the heat generated by the conductive metal plate is absorbed by the aluminum layer,
Good container heating efficiency. Since the aluminum layer is provided with radial slits exposing the conductor metal plate and connection slits connecting the radial slits, there is no generated current leaking to the aluminum layer, and the amount of heating of the conductor metal plate is increased. (3) Since the connection slits of the conductor metal plate are provided on the inner peripheral surface and the outer peripheral surface of the bottom surface of the container, they are excellent in positioning during casting. (4) Since the bottom surface of the container is an aluminum layer and only the conductor metal plate is exposed, the finish workability is excellent and a flat surface can be easily obtained. Moreover, it is also excellent in design workability such as bottom patterning.

[Brief description of drawings]

FIG. 1 is a bottom view of a container for an electromagnetic cooker according to the present invention.

FIG. 2 is a sectional view taken along the line WW of FIG.

FIG. 3 is a cross-sectional view (or a Y-Y cross-sectional view or a ZZ cross-sectional view) of FIG.

FIG. 4 is a plan view of a conductor metal plate.

5 is a cross-sectional view taken along line VV of FIG.

FIG. 6 is a bottom view showing a conventional example of a container for an electromagnetic cooker.

7 (A)-(J) are illustrations of an improved study on which the present invention is based.

[Explanation of symbols]

 1 Container Main Body 1a Bottom Wall 2 Conductor Metal Plate 4 Radial Slits 5, 5'Small Diameter Connection Slits 6, 6'Large Diameter Connection Slits 8, 9 Annular Protrusions 10 Radial Protrusions

Claims (2)

[Claims] 1. A plurality of radial slits, which are formed by embedding a conductive metal plate in a bottom wall of a container body made of aluminum or an aluminum alloy (hereinafter referred to as aluminum), and dividing an aluminum layer on an outer bottom wall surface of the container body. And a connection slit that divides the aluminum layer and connects the radial slits to each other. 2. The connection slit comprises at least one of a large-diameter connection slit connecting the outer side portions of the radial slit to each other and a small-diameter connection slit connecting the inner side portions of the radial slit to each other. A container for an electromagnetic cooker according to claim 1.